Do you agree that you can learn something by watching the American Movies

It has been so popular for English learners and English lovers watching American Movies from time to time which most of them think that they can get and learn something from there. One of my students keep this habit for months already, which he found he got some improvement of the listening. Before starting the movie, he usually open the "explorer" in the pc for being ready to look up the E-dictionary once he gets something new and unknow words from the movie.

I personally agree that we definetely can learn something from watching the American Movies even we could be shocked to learn some very native speaking way there, which we may not get it from the text books. If we try to speak English, we should really try to talk in native way instead of "Chinglish", shouldn't we?